345328889 has 2 divisors, whose sum is σ = 345328890. Its totient is φ = 345328888.

The previous prime is 345328873. The next prime is 345328901. The reversal of 345328889 is 988823543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243984400 + 101344489 = 15620^2 + 10067^2 .

It is a cyclic number.

It is not a de Polignac number, because 345328889 - 2⁴ = 345328873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345328849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172664444 + 172664445.

It is an arithmetic number, because the mean of its divisors is an integer number (172664445).

Almost surely, 2^345328889 is an apocalyptic number.

It is an amenable number.

345328889 is a deficient number, since it is larger than the sum of its proper divisors (1).

345328889 is an equidigital number, since it uses as much as digits as its factorization.

345328889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 50.

The square root of 345328889 is about 18583.0269062927. The cubic root of 345328889 is about 701.5807060707.

The spelling of 345328889 in words is "three hundred forty-five million, three hundred twenty-eight thousand, eight hundred eighty-nine".